Answer:
The atoms in the first period have electrons in 1 energy level. The atoms in the second period have electrons in 2 energy levels. The atoms in the third period have electrons in 3 energy levels. The atoms in the fourth period have electrons in 4 energy levels.
Question:
How many neutrons are there in 186W
Answer:
112
hope it helps (^^)
# Cary on learning
It is when two or more different substances which are mixed
When MgO and H2O react they form Magnesium Hydroxide Mg(OH)2
No. of moles = mass / molar mass
= 100/35.5
